CPC G02B 6/4436 (2013.01) [G02B 6/4402 (2013.01); G02B 6/4433 (2013.01)] | 15 Claims |
1. A fiber optic cable comprising:
at least one optical fiber element including a glass core and cladding layer on the core;
a primary buffer layer positioned over the at least one optical fiber element;
an inner jacket layer positioned over the primary buffer layer;
a strength member layer surrounding the inner jacket layer, the primary buffer layer and the at least one optical fiber element, the strength member layer including a plurality of yarns of fiber material positioned together to circumferentially surround the inner jacket layer, primary buffer layer and at least one optical fiber element to form the strength member layer;
at least one of the yarns of the fiber material of the strength member being formed of a high temperature fiber material having at least one of a softening point exceeding 950° C. or a rated operating temperature exceeding 950° C. and at least one of the yarns of the fiber material including aramid fibers, and the strength member layer including a combination of the high temperature fiber material and aramid fibers with the composition of the strength member layer including at least 25% high temperature fiber material with respect to the remaining fiber material of the overall strength member layer;
an outer jacket layer positioned over the strength member layer, the outer jacket layer being formed of a highly flame-resistant material.
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